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transmission will not shift in to high side

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jakebrake13, Aug 18, 2008.

  1. Aug 18, 2008 #1
    jakebrake13

    jakebrake13 Bobtail Member

    1
    0
    Aug 18, 2008
    IVANHOE, IL
    0
    I have a 1996 pete 378 with a 3176 cat and a 8LL trans all of a sudden in will not sift to high side all it does is grind. removed all air lines to trans. and blew them out removed air cylinder on back of trans and clean resealed, also removed top cover and watched the gear cluster move seemed to engage and disengaged fine?? at loss is it time for new trans? any help would be great thanks
     
    jakebrake13, Aug 18, 2008
    jakebrake13, Aug 18, 2008
    #1
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  3. Aug 18, 2008 #2
    SPIKE 64

    SPIKE 64 Light Load Member

    150
    27
    Feb 26, 2008
    San Antonio tx.
    0
    You cant see the rear section from with the top cover off, drain the oil and look for metal shavings, My buddy had a similar problem but it was'nt a 8LL,he had a 9 speed and ended up re-doing the rear section they found exsesive wear on the syncro.(cost him about $800 and a day to do it )
     
    SPIKE 64, Aug 18, 2008
    SPIKE 64, Aug 18, 2008
    #2
  4. Aug 19, 2008 #3
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

    18,750
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    Sep 18, 2006
    the road less travelled
    0
    On the 8LL, if the shifter for the creeper gears gets partially engaged or out of adjustment, it will prevent you from shifting into the high side. Was it suddenly an issue, or did it come about gradually? I'm trying to remember what the switch looked like, I only drove one a couple times several years ago, but I had that problem, once.
     
    25(2)+2, Aug 19, 2008
    25(2)+2, Aug 19, 2008
    #3
  5. Aug 19, 2008 #4
    dray

    dray Bobtail Member

    7
    1
    Aug 12, 2008
    McDonough georgia
    0
    sounds like the syncro in the back box
     
    dray, Aug 19, 2008
    dray, Aug 19, 2008
    #4
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